package org.jeecg.modules.sanitation2.controller;

import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipFile;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;



public class unZipController {
    private static final org.slf4j.Logger LOGGER = LoggerFactory.getLogger(unZipController.class);


    @RequestMapping(value = "/saveScorePhoto", method = {RequestMethod.POST})
    @ResponseBody
    public Map<String, Object> batchadd(HttpServletRequest request, MultipartFile file, HttpServletResponse response) throws Exception {


        /*
         *创建临时文件夹
         * 解压文件
         */
        String fileName = file.getOriginalFilename();
        String path = "d:/zip/";
        File dir = new File(path);
        dir.mkdirs();
        String filePath = "d:/test/";
        File fileDir = new File(filePath);
        fileDir.mkdirs();
        File saveFile = new File(fileDir, fileName);//将压缩包解析到指定位置
        List<String> list = new ArrayList<>();
        try {
            file.transferTo(saveFile);
            String newFilePath = filePath + fileName;
            File zipFile = new File(newFilePath);
            unZipFiles(zipFile, path);//解压文件，获取文件路径
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("解压执行失败");
        }
        //程序结束时，删除临时文件
        deleteFiles(filePath);//删除压缩包文件夹
        deleteFiles(path);//删除解压文件夹**

        Map<String, Object> jsonMap = new HashMap<String, Object>();
        jsonMap.put("ret",list);
        return jsonMap;
    }

    /**
     * zip解压
     * @param srcFile        zip源文件
     * @param destDirPath     解压后的目标文件夹
     * @throws RuntimeException 解压失败会抛出运行时异常
     */
    public static void unZipFiles(File srcFile, String destDirPath) throws RuntimeException {
        long start = System.currentTimeMillis();
        // 判断源文件是否存在
        if (!srcFile.exists()) {
            throw new RuntimeException(srcFile.getPath() + "所指文件不存在");
        }
        // 开始解压
        ZipFile zipFile = null;
        try {
            zipFile = new ZipFile(srcFile);
            Enumeration<?> entries = zipFile.getEntries();
            while (entries.hasMoreElements()) {
                ZipEntry entry = (ZipEntry) entries.nextElement();
                System.out.println("解压" + entry.getName());
                // 如果是文件夹，就创建个文件夹
                if (entry.isDirectory()) {
                    String dirPath = destDirPath + "/" + entry.getName();
                    File dir = new File(dirPath);
                    dir.mkdirs();
                } else {
                    // 如果是文件，就先创建一个文件，然后用io流把内容copy过去
                    File targetFile = new File(destDirPath + "/" + entry.getName());
                    // 保证这个文件的父文件夹必须要存在

                    if(!targetFile.getParentFile().exists()){

                    }
                    targetFile.createNewFile();
                    // 将压缩文件内容写入到这个文件中
                    InputStream is = zipFile.getInputStream(entry);
                    FileOutputStream fos = new FileOutputStream(targetFile);
                    int len;
                    byte[] buf = new byte[1024];
                    while ((len = is.read(buf)) != -1) {
                        fos.write(buf, 0, len);
                    }
                    // 关流顺序，先打开的后关闭
                    fos.close();
                    is.close();
                }
            }
            long end = System.currentTimeMillis();
            System.out.println("解压完成，耗时：" + (end - start) +" ms");
        } catch (Exception e) {
            throw new RuntimeException("unzip error from ZipUtils", e);
        } finally {
            if(zipFile != null){
                try {
                    zipFile.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    /**
     * @param filePath
     * 临时文件的删除
     * 删除文件夹里面子目录
     * 再删除文件夹
     */
    public void deleteFiles(String filePath) {
        File file = new File(filePath);
        if ((!file.exists()) || (!file.isDirectory())) {
            System.out.println("file not exist");
            return;
        }
        String[] tempList = file.list();
        File temp = null;
        for (int i = 0; i < tempList.length; i++) {
            if (filePath.endsWith(File.separator)) {
                temp = new File(filePath + tempList[i]);
            }
            else {
                temp = new File(filePath + File.separator + tempList[i]);
            }
            if (temp.isFile()) {
                temp.delete();
            }
            if (temp.isDirectory()) {
                this.deleteFiles(filePath + "/" + tempList[i]);
            }
        }
        // 空文件的删除
        file.delete();
    }

}



